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Income Taxes (Uncertain Tax Positions) (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Liability for uncertain tax positions, noncurrent $ 1,610 $ 1,554
Reduction to deferred tax assets 1,189 1,100
Unrecognized tax benefits, income tax penalties and interest expense 18 $ 30
Anticipated decrease of unrecognized tax liability, within twelve months $ 13